After addition and subtraction, multiplication and division are the most common parts of maths. That's true in KS3 Maths just as much as it is in junior school or university. Once you've got the hang of multiplication and division it becomes quite easy  even when working with decimals.
Multiplication and division of decimals is very similar to normal multiplying and dividing of numbers. The one thing you need to be aware of is the placement of the decimal point. It might help you to make a guess as to the answer before you do your calculations. For example, if you multiply 2.3 x 4.01 you know that the answer will be something like 9, not 92,000! Better still, learn the rules for placing decimal points in multiplication and division  that will make the problems much easier to solve.
In the following quiz I recommend that you estimate your answers before you do your calculations  that should help! Good luck.














To multiply by 5 simply move all the digits one place to the left and then halve the answer

To doublecheck your answer, £1.57 + £1.57 + £1.57 is the same as £1.57 x 3!


An approximation would be 50 x 7 = 350 so you know straightaway that last two answers are wrong

6 ÷ 4 =1.5 and 0.4 ÷ 4 = 0.01. Now just add these two figures together


Remember to estimate the answer. £6.00 x 4 = £24.00, so the figure should be close to this

Remember  all the digits move one place to the left when multiplying by 10


You could work this one out in your head by first dividing 1,270.5 by 3 to get 423.5. Next you would divide 423.5 by 10 to get 42.35 (one 30th of 1,270.5). Multiply this number by 2 for the answer: 84.7. Or you could use pen and paper  much easier!

34 ÷ 4 = 8.5 and 0.44 ÷ 4 = 0.11. Add these two figures together for the answer


To divide by 10 just move all the digits one space to the right

Remember that 14p = 0.14 when written in decimals!
